Artificial stone cutter



Jan. 15, 1957 E. F. MANGIS ARTIFICIAL STONE CUTTER Filed Sept. 9, 1955 2 Sheets-Sheet l EEEEEEEEEE- Elmer F. Mung/s IN V EN TOR. U052;

Jan. 15, 1957 E. F. MANGIS 2,777,

ARTIFICIAL STONE CUTTER Filed Sept. 9, 1955 2 Sheets-Sheet 2 um 1mm IIIIIIIII Elmer F. Mung/s g 4 INVENTOR.

BY WF/W m United States Patent O 2,777,438 ARTIFICIAL STONE CUTTER Elmer F. Mangis, Frankfort, Ind.

Application September 9, 1955, Serial No. 533,348

1 Claim. (Cl. 125-23 This invention relates to an apparatus for utilization in cutting various types of building materials, such as artificial stone, various types of cementitious products, and natural materials in a convenient and highly advantageous manner.

The primary object of the present invention resides in the provision of a stone cutter which employs an opposed set of blades so arranged as to start a fissure or break in artificial or natural stone at a desired location.

A further object of the invention resides in the provision of a stone cutter designed for use in cutting artificial stone formed of cementitious mixtures by causing the stones to be cut or cracked along a desired line without causing crumbling or breaks in other parts of the material.

An additional object of the invention resides in the provision of a stone cutter which can be readily adjusted for cutting various sizes and shapes of stones.

The construction of this invention features a novel arrangement of blades whereby a work piece is adapted to be supported upon a resiliently mounted tray in an overlying position relative to a lower blade with the tray being resiliently mounted so as to be depressed not only by the weight of the stone itself but to absorb some of the shock of the depression of the upper blade, thereby ensuring against any cracks or breaks or crumbling of the material at locations other than that desired.

Still further objects and features of this invention reside in the provision of a stone cutter that is simple in construction, highly efficient in operation, and relatively inexpensive to manufacture, thereby enabling comparatively wide distribution to the trade.

These, together with the various ancillary objects and features of the invention which will become apparent as the following description proceeds, are obtained by this stone cutter, a preferred embodiment of which has been illustrated in the accompanying drawings, by way of example only, wherein:

Figure 1 is a front elevational view of the stone cutter comprising the present invention;

Figure 2 is a vertical sectional detail view as taken along the plane of line 22 in Figure l Figure 3 is a vertical sectional view as taken along the plane of line 3-3 in Figure 2;

Figure 4 is a plan view of the stone cutter; and

Figure 5 is a vertical sectional detail view as taken along the plane of line 5-5 in Figure 2 illustrating the resilient mounting provided for the tray.

With continuing reference to the accompanying drawings wherein like reference numerals designate similar parts throughout the various views, reference numeral generally designates the stone cutter comprising the present invention. The stone cutter 10 includes three tubular members 12, 14 and 16 which form a stand for the device. The tubular members 12, 14 and 16 are secured to two angle-shaped supporting elements 18 and 20 which have secured thereto and positioned therebetween a lower 2. blade holding bracket 22 held in place by means of bolts 24'.

The supporting member 18 has a first platform 26 mounted thereon by any suitable means and mounted on the supporting member 20 are angle-shaped members 28' and 30, see Figures 2 and 5 in particular, which form a second supporting platform.

A tray 32 is held in vertically spaced relationship with" naled. The shaft has end portions 58 and 60 of reduced cross-sectional area with the axis of the end portions 58 and 60 eccentrically disposed with respect to the axis of the main or central portions of the shaft 56. A crank arm 62 is held in position by a setscrew 64 about the shaft and is provided for rotating the shaft 56. An car 66 is afiixed to the crank arm 62 and a spring 68 is secured to the ear 66 and to the leg 12 for urging the crank arm 62 and hence the shaft to an initial position.

Fitting over the shaft ends 58 and 60 are eyes 70 and 72 at the end of standards 74 and 76, the upper ends 78 and 80 of which are externally threaded. Threadedly engaged on the threaded ends 78 and 8% of the standards 76 and 78 are sprockets 82 and 84 which have lower hubs journaled in bearing blocks 86 and 88 which are adjustable within mounting blocks 90 and 92 secured by fasteners 94 and 96 to an upper blade mounting bracket 98. Also carried by the bracket 98 is a plate 100 having a sprocket wheel 102 rotatably mounted thereon and adapted to be rotated by means of a handle 104. A chain 106 is entrained about the sprockets 82, 84 and 102 and upon actuation of the chain, the sprockets 82 and 84 will be rotated to raise and lower both the sprockets and the upper blade mounting bracket 98. Secured to the upper blade mounting bracket by means of bolts 110 or other suitable fasteners is an upper blade 112 which is arranged in opposed relationship relative to the blade 114 held in place by suitable bolts or fasteners 116 to the lower blade mounting bracket 22.

In use, a stone or other material may be placed upon the tray 32 with the ends extending beyond the knife edges of the blade measured by means of the scale 42.

Then, operating the crank arm 62, the standards 76 and '78 as well as the upper blade 112 can be brought downwardly into engagement with the upper edge of the stone a suflicient distance, such as indicated at in Figure 2, to start a fissure in the stone, thereby causing a break in the stone at the desired point. It is noted that the tray 32 because of its resilient mounting will give way enough so that the fissure will also be started in the lower edge of the stone by the lower blade 114.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

A stone cutter comprising a stand, a pair of platform sections carried by said stand, a blade carrying bracket positioned between said platform sections and secured thereto, a lower blade secured in said bracket, support bearings secured to said bracket, a shaft journaled in said bearings, said shaft having eccentric end portions, a pair of standards forming upper blade support means engaging said eccentric end portions, an upper blade bracket, said standards being threaded, a pair of sprockets threadedly engaged on said standards, said sprockets being mounted on said upper blade bracket, means for rotating said sprockets to adjust said upper blade bracket, an upper blade mounted in said upper blade bracket, and means for rotating said shaft to depress said upper blade, one of said platform sections having a tray resiliently mounted thereon, said tray normally extending above said lower blade.

References Cited in the file of this patent UNITED STATES PATENTS Clarke Sept. 14,

Patterson Sept. 1,

White Nov. 2,

Price Apr. 22,

Gatzke Nov. 3,

FOREIGN PATENTS France Ian. 11, 

